Surveying
The principal line is the line joining the principal point and

Perspective centre
None of these
Nadir
Isocenter

ANSWER DOWNLOAD EXAMIANS APP

Surveying
A telescope is said to be inverted if its

vertical circle is to its right and the bubble of the telescope is up
vertical circle is to its left and the bubble of the telescope is up
vertical circle is to its right and the bubble of the telescope is down
vertical circle is to its left and the bubble of the telescope is down

ANSWER DOWNLOAD EXAMIANS APP